Replace Nano with Visual Studio Code in setup instructions

[snotskie]

I am teaching this lesson next week. Reviewing the materials, I would like to change the setup instructions to use Visual Studio Code instead of nano.

Four motivations:

• Alignment with other tutorials: VS Code is a popular text editor in other Julia tutorials, eg. those listed here.
• Alignment with community practice: VS Code is also popular in the Julia community as our replacement for RStudio and a number of now-defunct Electron-based Julia IDEs. (RStudio recently was renamed to Posit to be a more general tool, so we'll have to see how it compares to VS Code in the near future.)
• Alignment with future lessons: Julia is a scientific programming language, so it is important to be able to view plots in the same tool we are coding in. This lesson does not involve creating plots, but future ones might.
• Ease of instruction: And when teaching on Zoom, it is easier (for me) to manage if everything (REPL, code, files, and outputs) are all in one window, that way I can keep my notes up on my screen without showing them to the learners.

This is my first time editing a carpentries lesson, so I tried to keep my changes minimal without deleting what was already there. I created a vscode.html drop-in replacement for editor.html instead of editing editor.html directly, and updated setup.md to match.

[BeastyBlacksmith]

I think it is a good idea to give VSCode instructions as an alternative rather than a replacement. Usually this course is thought to be tought in combination with the shell and the git lesson, which both use nano as text editor. So I'd leave it to the instructor to choose which editor to use for this lesson.

Recently a student of mine made a video about setting up julia with vscode, which we could link here.

[snotskie]

I think having both / leaving to the instructor is a good idea

good video too!

should I make the changes on my fork?

[BeastyBlacksmith]

should I make the changes on my fork?

That would be good, yes :)

[snotskie]

Changes made, how's it look?

[BeastyBlacksmith]

Looks good, thank you :) You might add yourself to the AUTHORS file